xref: /openbmc/linux/arch/mips/ar7/setup.c (revision c9b02990)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Carsten Langgaard, carstenl@mips.com
4  * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
5  */
6 #include <linux/init.h>
7 #include <linux/ioport.h>
8 #include <linux/pm.h>
9 #include <linux/time.h>
10 
11 #include <asm/reboot.h>
12 #include <asm/mach-ar7/ar7.h>
13 #include <asm/mach-ar7/prom.h>
14 
ar7_machine_restart(char * command)15 static void ar7_machine_restart(char *command)
16 {
17 	u32 *softres_reg = ioremap(AR7_REGS_RESET + AR7_RESET_SOFTWARE, 1);
18 
19 	writel(1, softres_reg);
20 }
21 
ar7_machine_halt(void)22 static void ar7_machine_halt(void)
23 {
24 	while (1)
25 		;
26 }
27 
ar7_machine_power_off(void)28 static void ar7_machine_power_off(void)
29 {
30 	u32 *power_reg = (u32 *)ioremap(AR7_REGS_POWER, 1);
31 	u32 power_state = readl(power_reg) | (3 << 30);
32 
33 	writel(power_state, power_reg);
34 	ar7_machine_halt();
35 }
36 
get_system_type(void)37 const char *get_system_type(void)
38 {
39 	u16 chip_id = ar7_chip_id();
40 	u16 titan_variant_id = titan_chip_id();
41 
42 	switch (chip_id) {
43 	case AR7_CHIP_7100:
44 		return "TI AR7 (TNETD7100)";
45 	case AR7_CHIP_7200:
46 		return "TI AR7 (TNETD7200)";
47 	case AR7_CHIP_7300:
48 		return "TI AR7 (TNETD7300)";
49 	case AR7_CHIP_TITAN:
50 		switch (titan_variant_id) {
51 		case TITAN_CHIP_1050:
52 			return "TI AR7 (TNETV1050)";
53 		case TITAN_CHIP_1055:
54 			return "TI AR7 (TNETV1055)";
55 		case TITAN_CHIP_1056:
56 			return "TI AR7 (TNETV1056)";
57 		case TITAN_CHIP_1060:
58 			return "TI AR7 (TNETV1060)";
59 		}
60 		fallthrough;
61 	default:
62 		return "TI AR7 (unknown)";
63 	}
64 }
65 
ar7_init_console(void)66 static int __init ar7_init_console(void)
67 {
68 	return 0;
69 }
70 console_initcall(ar7_init_console);
71 
72 /*
73  * Initializes basic routines and structures pointers, memory size (as
74  * given by the bios and saves the command line.
75  */
plat_mem_setup(void)76 void __init plat_mem_setup(void)
77 {
78 	unsigned long io_base;
79 
80 	_machine_restart = ar7_machine_restart;
81 	_machine_halt = ar7_machine_halt;
82 	pm_power_off = ar7_machine_power_off;
83 
84 	io_base = (unsigned long)ioremap(AR7_REGS_BASE, 0x10000);
85 	if (!io_base)
86 		panic("Can't remap IO base!");
87 	set_io_port_base(io_base);
88 
89 	prom_meminit();
90 
91 	printk(KERN_INFO "%s, ID: 0x%04x, Revision: 0x%02x\n",
92 			get_system_type(), ar7_chip_id(), ar7_chip_rev());
93 }
94